VS-81RIA40

Current - On State (It (RMS)) (Max):	125A
Supplier Device Package:	TO-209AC (TO-94)
Package / Case:	TO-209AC, TO-94-4, Stud
Mounting Type:	Chassis, Stud Mount
Operating Temperature:	-40°C ~ 125°C
SCR Type:	Standard Recovery
Current - Non Rep. Surge 50, 60Hz (Itsm):	1600A, 1675A
Current - Off State (Max):	15mA
Current - Hold (Ih) (Max):	200mA
Series:	--
Current - On State (It (AV)) (Max):	80A
Voltage - On State (Vtm) (Max):	1.6V
Current - Gate Trigger (Igt) (Max):	120mA
Voltage - Gate Trigger (Vgt) (Max):	2.5V
Voltage - Off State:	400V
Part Status:	Active
Packaging:	Bulk

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Thyristors - SCRs

Thyristors are a type of semiconductor device that acts as a switch by controlling electric current with three or more leads. They are also known as silicon-controlled rectifiers (SCRs). This article will discuss the application field and working principle of a specific thyristors - the VS-81RIA40.

Application Field

The VS-81RIA40 is a popular choice of thyristors for applications where high voltage and high currents are needed, such as in circuits for motor control, switching power supplies, and rectifiers. The device is easily capable of handling power ratings of up to 1800V, and has a high maximum current handling capability of 800A, making it suitable for a range of different applications.Furthermore, the particular design of the VS-81RIA40 makes it well suited to applications where fast switching speeds are required, such as voltage regulation and rectification purposes. This thyristor is able to switch in as little as 10 microseconds, meaning it can respond quickly to changes in current and quickly react to the demands of the device it is controlling.Finally, the VS-81RIA40 is well suited to applications where the device needs to be protected against failure or abuse, thanks to its built-in circuitry. This circuitry is designed to protect the device from short circuits, over-voltages and long-term over-current states.

Working Principle

The working principle behind the VS-81RIA40 thyristors is driven by its three-terminal design. It has an anode, a cathode, and a gate lead, which must be connected to the circuit in order for the device to switch on.When the gate lead is connected to the anode, it causes a current to flow from the cathode to the anode, effectively activating the thyristor. This current allows the device to enter its ‘on’ state and start conducting current across the anode and cathode.Once the device has been activated, it will remain in the ‘on’ state until the current through it drops below a certain threshold, or, if the gate lead is connected to the cathode, the current through the thyristor will be reversed and the device will switch off. The device can also be switched off by simply disconnecting the gate lead from the anode or cathode, or by applying a higher voltage across the anode and cathode.

Conclusion

The VS-81RIA40 thyristor is a versatile and reliable device for applications which require powerful current capabilities and very fast switching speeds. It is well suited to a range of motor control and voltage regulation applications, and is designed to protect itself from failures or abuse. Its working principle is based on its three terminal design, with an anode, cathode, and gate lead, which must be connected to the circuit in order for it to switch on and off.

The specific data is subject to PDF, and the above content is for reference